JPS6319129B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a planting device equipped on a traveling aircraft with a float that detects the ground load, and is equipped with an automatic control mechanism that maintains the float ground load within a set range. The present invention relates to an improvement of a rice transplanter configured to stabilize the planting depth by keeping the level of the planting device with respect to the rice field substantially constant.

This type of rice transplanter runs with a ground load acting on the float, so when the machine reaches the edge of the field and changes direction, a large amount of mud is pushed from the side of the float. Unfortunately, this float creates resistance when the aircraft turns.

In order to avoid such inconvenience, conventionally,
There is also a technology that releases the automatic control state in conjunction with the disengagement operation of the planting clutch and forcibly pushes down the wheels to relatively reduce the ground load of the float, but in this case, it is difficult to force the wheels to move up and down. This has the disadvantage that it tends to cause time loss and makes it difficult to carry out efficient aircraft rotation operations.

The technical problem to be solved by the present invention is, as described above, in a rice transplanter equipped with an automatic control mechanism that maintains the float ground load within a set range, the automatic control function of the automatic control mechanism can be effectively applied even when the machine turns. By using this method, we can reduce the ground load of the float without incurring time loss such as raising and lowering the wheels, and we have devised a way to efficiently turn the aircraft while suppressing the occurrence of large amounts of mud pushing and turning resistance. be.

The technical means of the present invention taken to solve the above problems is to provide a planting device attached to the traveling machine with a float that detects the ground load, and is equipped with an automatic control mechanism to maintain the float ground load within a set range. In the rice transplanter, a spring is interposed between the planting device and the float, and the float is attached to the planting device in a state where it is elastically biased downward, and the spring is attached to the planting device side. The spring receiving member is configured to be able to change its position in the direction of increasing or decreasing the elastic biasing force toward the lower side of the spring, and furthermore, the spring receiving member and the planting clutch are connected to each other when the spring is released as the planting clutch is released. This is linked to change the position of the spring receiving member in the direction of weakening the biasing force.

The effects of taking the above technical measures are as follows.

While the aircraft was traveling straight ahead during seedling planting work, when the float, which was sliding on the muddy surface, detected a change in the ground load, an automatic control mechanism was activated to maintain the float ground load within a set range. This is to carry out rice planting work. When the machine reaches the edge of the field and attempts to rotate the machine, the planting clutch is disengaged and the spring receiving member operates in a direction that weakens the downward biasing force of the spring. Therefore, the float detects the relative displacement between the mud surface and the traveling aircraft in a state where the supporting action of the ground load is extremely weakened.In other words, by weakening the biasing force of the spring, the float is The setting range of ground load to be applied is set to an extremely low load range, and therefore,
The float, which reacts sensitively to small loads, has an automatic control mechanism that maintains the small ground load while sliding near the mud surface where the amount of sinking is small. will be put to work.

The rice transplanter of the present invention having the above-mentioned functions has the following effects.

In other words, the biasing force of the spring is weakened as the planting clutch is disengaged, and the setting range of the float grounding load becomes small, so the automatic control mechanism is activated to prevent the float from sinking even while the aircraft is rotating. This technology was able to reduce the occurrence of a large amount of mud pushing and an increase in turning resistance.Moreover, in reducing the occurrence of mud pushing and an increase in turning resistance, it was possible to reduce the occurrence of mud pushing and increase in turning resistance. Compared to systems that raise and lower the wheels, it is possible to immediately maneuver the aircraft without incurring the time loss required to raise and lower the wheels, which has the advantage of allowing extremely efficient aircraft rotation. be.

Embodiments of the present invention will be described below based on the drawings. Figures 1 and 2 show the entire rice transplanter. This rice transplanter is equipped with traveling wheels 1, 1 for a drive tiller a that can swing up and down, and a driver's seat 2. A pair of left and right mud surfaces b are provided at the rear of the riding-type traveling body 3 comprising the driving unit 9, which cooperate with the wheels 1 and 1 pair to support the body on the ground and level the mud surface to be planted. It consists of a four-row planting device 5 equipped with soil leveling floats 4, 4 connected together, and the ground load of the floats 4, 4 in the planting device 5 is maintained within a set range by adjusting the longitudinal balance of the machine body. It has an automatic control mechanism 6 like this.

The floats 4, 4 are configured to be vertically swingable with respect to the planting device 5, and a compression spring 10 for setting the ground load is interposed between the floats 4 and the planting device 5, so that changes in the ground load can be controlled. It is designed to respond to

The automatic control mechanism 6 moves the driver's seat 2 in the front-back direction to adjust the longitudinal balance of the aircraft, and is equipped with a hydraulic cylinder 6A for moving the driver's seat.
The operation of the control valve 6B is linked to the vertical swinging of one of the floats 4, 4 in the planting device.

Further, the wheels 1, 1 pair are automatically controlled to ascend and descend based on variations in the depth of the plowing platform so as to maintain the height of the machine body relative to the mud within a set range,
This automatic wheel control mechanism includes a hydraulic cylinder 11 for lifting and lowering the wheels, and a ground sensor 12 that swings up and down in response to changes in the height of the aircraft body relative to the mud.
The operation of the control valve 13 with respect to the hydraulic cylinder 11 and the vertical swinging of the sensor 12 are linked to maintain the swinging attitude of the sensor 12 relative to the aircraft within a set range.

The planting device 5 reciprocates the seedling tray 5A in a forward-leaning position in the lateral direction, and plants the seedlings between the four seedling take-out ports 5a from the lower end of the seedling tray 5A and the leveling mud surface. Cyclically operate the claw 5B...
In addition, each time the seedling table 5A is located at the end of its reciprocating path, the seedlings placed thereon are sent to the side of the seedling take-out port 5a, so that the placed seedlings are taken out and planted in units of planting units. There is.

Therefore, a mechanism 7 is provided that automatically and reversibly reduces the set ground load of the float 4 in conjunction with the cutting operation of the planting clutch 8, which is a necessary operation when the aircraft turns. , is configured to automatically reduce the ground load of the float 4 by adjusting the body longitudinal balance by the automatic control mechanism 7, and the lower part of the driving unit 9 includes:
A turning float 14 that touches the ground on the mud surface b by tilting the aircraft forward as a result of adjusting the longitudinal balance of the aircraft for reducing the ground load, and supports the aircraft on the ground in cooperation with the wheels 1 and 1 pair when the aircraft turns. are fixedly connected. The mechanism 7 attaches the spring receiving member 7A on the planting device 5 side to the ground load setting compression spring 10 so as to be swingable in the direction of increasing or decreasing the biasing force of the spring 10, and also connects the spring receiving member 7A with the spring receiving member 7A. , the planting clutch 8 attached to the control handle 15 is interlocked with the swing operation lever 7B via the wire 7C, and the spring 10 is relaxed by the cutting operation of the planting clutch, and the float 4 is The structure is designed to reduce the set ground load. The left and right side portions 14a, 14a of the lower surface 14A of the turning float 14 are as follows:
In order to suppress mud pushing due to turning, the slope surface is positioned higher toward the outer side, and a rising wall 14C is provided around the front half of the turning float 14.
The left and right side portions 14b, 14b of the upper surface 14B of the rotating float, including the rising wall 14C, are formed into inclined surfaces that are positioned lower toward the outer side, and 14
The first half of the upper surface 14B is configured to have a rear downward slope so as to provide drainage to the rear,
Further, a drainage groove 14c extending rearward along the front-rear direction is formed in the center of the upper surface 14B.

[Brief explanation of the drawing]

The drawings show an embodiment of the rice transplanter according to the present invention, in which Fig. 1 is an overall side view, Fig. 2 is an overall plan view, Fig. 3 is an operation system diagram, and Fig. 4 is an enlarged longitudinal sectional front view of main parts. be. 3... Traveling machine body, 4... Float, 5... Planting device, 6... Automatic control mechanism, 7A... Spring receiving member, 8... Planting clutch, 10... Spring.

Claims (1)

[Claims] 1 A float 4 that detects a ground load is provided on the planting device 5 attached to the traveling body 3, and an automatic control mechanism 6 that maintains this float ground load within a set range.
In a rice transplanter equipped with the following, a spring 10 is interposed between the planting device 5 and the float 4, and the float 4 is attached to the planting device 5 in a state in which it is elastically biased downward. The spring receiving member 7A of the spring 10 on the side of the planting device 5 is configured to be repositionable in the direction of increasing or decreasing the elastic biasing force toward the downward side of the spring 10,
Furthermore, this spring receiving member 7A and the planting clutch 8 are linked so that the position of the spring receiving member 7A is changed in a direction to weaken the biasing force of the spring 10 as the planting clutch 8 is disengaged. A rice transplanter featuring: